SATHYABAMA UNIVERSITY (Established under section 3 of UGC Act, 1956)

Course & Branch: B.E – Mechanical (Part Time) Title of the paper: Materials Science and Metallurgy Semester: I Max. Marks: 80 Sub.Code: 615PT104 (2007/2007 JAN/2008 JAN) Time: 3 Hours Date: 22-05-2008 Session: FN

PART – A (10 x 2 = 20) Answer All the Questions

1. What are Miller Indices? 2. What do you mean by Solid Solution? 3. How will you classify cast iron? 4. What is soldering? 5. What is meant by hardening of a metal? 6. What is sintering? 7. Neatly draw stress-strain curve for a ductile material and state

Hook’s Law. 8. Differentiate between Brittle fracture and Ductile fracture. 9. Define the ultimate stress. 10. What is Endurance Limit?

PART – B (5 x 12 = 60)

Answer All the Questions

11. (a) Draw the Iron-Carbon phase diagram and explain its different region. (8) (b) Explain the deformation by slip. (4)

(or) 12. (a) Draw the unit cells of BCC, FCC and HCP crystals and

compare the packing efficiency in them. (8) (b) Explain allotropic transformations with examples (4)

13. Explain in detail the composition and uses of important AI and Cu alloys.

(or) 14. Explain in detail the effects of Carbon, silicon, Manganese,

Nickel, Chromium and Copper elements in cast iron.

15. Write short notes on the following: (a) Annealing (b) TTT diagram

(or) 16. Describe in detail the heat treatment of non-ferrous alloys. 17. Write short notes on the following:

(a) Age hardening (b) Precipitation hardening (or)

18. (a) Write the advantages and applications of powder metallurgy. (4)

(b) Explain the following (i) Compacting (ii) Hot pressing (8) 19. (a) Explain with a neat diagram the different stages in creep

curve. (b) State the different causes of fatigue failure.

(or) 20. (a) Discuss Griffth’s theory on brittle fracture.

(b) With neat sketches, explain the various stages of ductile feature.